Tamron's latest patent is for a 135mm f/2.8 lens for APS-C based cameras (202.5mm equivalent).
Canon filed patents for several different lenses:
Olympus filed a patent for a 40-200mm f/4 Micro Four Thirds lens.
Samsung filed a patent for a viewfinder with automatic parallax adjustment.
Olympus patented a light field adapter that can achieve selective focusing after the image has been taken similar to the current Lytro camera.
